Former U.S. Secretary of State Hillary Clinton Ethan Miller/Getty Images hide caption

itoggle caption Ethan Miller/Getty Images

With less than two years left in his presidency, President Obama has been less scripted and appears less confined by politics. Saul Loeb/AFP/Getty Images hide caption

itoggle caption Saul Loeb/AFP/Getty Images

Hillary Clinton spoke Tuesday at Christ the King United Church of Christ in Florissant, Mo. Whitney Curtis/Getty Images hide caption

itoggle caption Whitney Curtis/Getty Images

In 1981, Bernie Sanders won a 10-vote victory over a Democratic incumbent to become mayor of Burlington, Vt. Donna Light/AP hide caption

itoggle caption Donna Light/AP

Hillary Clinton, featured in a high school yearbook with the student council. Tamara Keith/NPR hide caption

itoggle caption Tamara Keith/NPR

Sen. Bernie Sanders drew a large crowd when he launched his campaign last month in Burlington, Vt., and the crowds have continued. Andy Duback/AP hide caption

itoggle caption Andy Duback/AP

Golden State Warriors guard Stephen Curry and his daughter Riley attend a news conference after Game 5 of the NBA Western Conference finals. Curry should be seen as a role model, pundits say. Ben Margot/AP hide caption

itoggle caption Ben Margot/AP